By Guy Faulconbridge LONDON (Reuters) – President Vladimir Putin said on Thursday that the world faced the most dangerous decade since World War Two as Western elites scrambled to prevent the inevitable crumbling of the global dominance of the United States and its allies. In one of his longest public appearances since he sent troops into Ukraine on Feb. 24, Putin signalled he had no regrets about what he calls “a special operation” and accused the West of inciting the war and of playing a “dangerous, bloody and dirty” game that was sowing chaos across the world. “The historical period of the …